Add dndscv plots and expanded needle plots

[FerriolCalvet]

No description provided.

[Copilot]

Pull request overview

This PR extends the DeepCSA pipeline’s positive-selection visualization and reporting by adding per-sample dNdScv outputs to the aggregated results and incorporating a new dNdScv track in the side-plot summaries, alongside generating an “expanded” variant of the needle plots.

Changes:

• Join per-sample dNdScv CV results into the workflow-level positive_selection_results channel and expose them from the DNDS subworkflow.
• Add a dNdScv track to the positive-selection side plot generation and load per-sample dNdScv CV metrics for plotting.
• Add expanded needle plot generation and update needle plotting to use explicit start/end positions.

Reviewed changes

Copilot reviewed 2 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
workflows/deepcsa.nf	Adds per-sample dNdScv CV results into the aggregated positive selection results stream.
subworkflows/local/dnds/main.nf	Exposes DNDS CV per-sample results as an emitted channel for downstream joins/plotting.
bin/utils_plot.py	Adds a color mapping for the truncating label used by new plots.
bin/plot_selectionsideplots.py	Adds dNdScv as an optional plotting track and loads per-sample dNdScv CV data for the summary plot.
bin/plot_needles.py	Adds “expanded” needle plots and switches plotting to use explicit start/end position ranges.

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